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Re: Bar plotting in IDL [message #87269 is a reply to message #87263]

Wed, 22 January 2014 07:33

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Madhavan Bomidi writes:

> I get the error as below:
>
> (1) CGAXIS -> Keyword array parameter XTICKNAME must have from 1 to 60 elements.
>
> (2) I get the figure with bars but I don't see my xnos or x-axis labels are matching with my xnos. For example, the last value of ydata is 90 and the bar for this value is shown at an xnos=94.
>
> My understanding for using bar plot may be wrong!!! Can anyone help me resolve the issues I am facing?

You are running into the same problem you ran into yesterday. IDL has a
limitation on the number of labels it can put on an axis (60
apparently). Each bar plot uses a label in this code.

I think I would try to write something like the Error Estimate Plot in
the Coyote Plot Gallery, where instead of plotting errors you plot the
median value with the quadrilles on either side of it. Not sure what you
should do with outliers in that case, but maybe they don't matter.

Or, I suppose you can try overplotting no more than 60 values at a time
on the plot. The code is pretty clunky. It was a direct port of the IDL
routine. But, it is possible to do some nice things with it.

http://www.idlcoyote.com/cg_tips/barplot.php

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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[Message index]

		Bar plotting in IDL By: atmospheric physics on Wed, 22 January 2014 06:57
		Re: Bar plotting in IDL By: Matthew Argall on Wed, 22 January 2014 07:30
		Re: Bar plotting in IDL By: David Fanning on Wed, 22 January 2014 07:33
		Re: Bar plotting in IDL By: atmospheric physics on Wed, 22 January 2014 07:46
		Re: Bar plotting in IDL By: David Fanning on Wed, 22 January 2014 07:55
		Re: Bar plotting in IDL By: atmospheric physics on Wed, 22 January 2014 07:58
		Re: Bar plotting in IDL By: Phillip Bitzer on Wed, 22 January 2014 08:13
		Re: Bar plotting in IDL By: atmospheric physics on Thu, 23 January 2014 01:07

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